Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Rock bit lubrication system utilizing expellable plug for obtaining expansion space

Rock bit lubrication system utilizing expellable plug for obtaining expansion space

US Patent 4274498 · Granted Jun 23, 1981

Estimated economic value: $9,683,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Subsea template and method for using the same1989